Changeable-speed gearing.



PATENTED JULY 28,- 1908.

I W. SGOTT. GHANGE'ABLE SPEED GEARING. APPLICATION FILED NOV 26,1907 7 A fro/inksw. Sam

GHANGEABLE SPEED GEARING.

' APPLIOATION FILED nov. 26, 1907 gsnnms-sHmT-T z.

PATBNTED JULY 28.1908.

gaged by the lo'rake band E un UNlTED STATES ATENT Erica.

WALTER SCOTT, OF SHERIDAN, WYOMING.

CHANGEABLErSBEED GEARING.

*Be it known that I, WALTER SCOTT, a citizen of the. United States, and a, resident of Sheridan, 1n the county of Sheridan. and

State of Wyoming, have invented a new and,

Improved Changeable-Speed Gearing, of which the following is a full, clear and exact description.

The object of the invention is to provide a new and improved changeable speed gearing, more especially designed for use on automobiles and other motor vehicles "and machines, and arranged to permit the operator to conveniently and quickly change the speed of thedriven shaft oraxle', or to, reverse the same whenever it is desired to do so.

, The invention consists of novel features and parts and combinations of the same,

which will be more fully described hereinafter and then ointed out in the claims I A practica embodiment of the invention' is represented in' the accompanying drawings forming-a part of thisspecificatiom'in which s milar characters of reference indicate responding parts in all the Views.

Figure 1 1s across section of the improvement Fig. 2 is a longitudinal sectional elevation ofthe same, on the line 22 of. Fig. 1;

Fig. 3 is a similar view of thesaine on the line 3 3- of Fig. 1;'and Fig. .4 a sectional plan view of the same Figss. a

The driving shaft A is connected with an engine or other motor, and extends into lihd on the 1 line ;4of

' is ournaled in a casing B, in which is also journaledone end ofa driven shaft C, ar-' ranged at right an les-to the driving shaft A, and connected in t e usual manner with the object to be driven. The shaft C may also represent the axle of the vehicle in case a direct drive is desired. lDn the driven shaft C is secured a brake drum D, adapted to be ener the control of the o erator, for braking the brake drum D"and t e driven shaft C whenever it is desired to do so.

On the face of the brake-drum D within the casin B arearranged concentric bevel gear whee s F, F and F in rnesh at one side of theitiiis of the shaft C with bevel; pinions G, G and G res ectively, the outermost bevel gear wheel F eing also in mesh with a reversing bevel. inion H on the other side of the axis of the s aft C, as plainly indicated in Each of the pinions G, G, G Y

the drawings.

Specification of Letters Patent. Application'filed November 26, 1907. Serial No. 03,892.

cor-

Patented .rul 'aa, 190s.

and H is mounted to turn loosely 'on the members I and J of friction clutch meohanisms, and of which members the member I is secured by a pin K. to the driving shaft A,

cured to the driving shaft A, thus allowing the clutch member J to slide lengthwise on the driving shaft A, and at thesamo tlme the clutch member J is carried round with the driving shaft A by the pin K. As indicated in the drawings, the clutch members I and J for each pinion G, G, G and Hfcngage the latter at opposite sides, so that when the clutch member'J is shifted towards the clutch member I, then the corrcs onding-pinionG, G, G or H rotates with t c shaft A by the corresponding ch tch mechanism in action at the time. are cngaged'by shifting'collars L, mounted loosely on the shaft A and having pins L engaged by levers N, N, N and N to actuate the clutch members'J for the different pinions G. G, G and H, respectively. The shifting levers N, N are provided at their free endswith pivoted arms 0 and O,-prcsscd on by springs P, 1 'and normally held against sto pins Q, Q by the action of the springsd (see Fig. 3'). The free ends of the arms'O, O are providedwith pins R, R and similar pins R R are arranged on the free ends of the shifting levers N and N The several pins R, R,B and R are ada ted to be engaged by .cam. arms S, S,-,S an S secured on the controller shaft T, journaled in thecasing B and under the control of the opmrator, to permit the latter to turn the said shaft T with a view to bring either of the 6am arms S, S, S or S in engagement with the corresponding pin R, R, R or R to shift the respective lever N, N, N or N, with a View to throwv the corresponding clutch mechanism in engagement with the pinion G, G, G or H. The cam arms'S, S, S and S radiate from the shaft T and stand at. iven angles one relative to tli e other, as

plainly indicated in Figs. 1 and 2, so as to en' able the operator to bring either one of the.

said camarms in operative engagement with the correspondlng P1118 R, R, R or R When it is desired to drive the shaft C for- The" ovable clutch -mcmbcrs J ward, 'then the controller shaft T is turned in the direction of the arrow 0, so as to'cause the corresponding arm S, S or S to shift the O, Q is to permit the cams to is desired to rotate the shaft Gina reverse direction then the operator turns the controller shaft "T in the reverse directionof the-arrow a, to bring the arms? in 0 erative relation to the pin R of the shifting ever N When the controller shaft is movedthe cam'arms S, and S; are the only ones which pass entirely past the corresponding ins,

andthe'purposeof the sprin pressed inks be turned backto their original position, since thelevers N, N cannot be moved backwardly sufficiently to let the camspass on the return movement.

'It" is understood that when the" pinion G is connected-with the shaft A by the correiponding friction clutch, then the gear wheel is rotated and'wi th it the shaft C at a slow but powerful speed an'd when the pinionG" is locked to the shaft A by its friction clutch,-

then the gear-wheel F is rotated at an intermediate speed, and whenthe pinion G isv locked to the shaft A it rotates the bevel gear wheel F at a high rate of speed'but with less power. When the inion' H is locked to the shaft by its friction'clutch then'the'gear wheel Fand' the shaft C are between the'movable clutch member J and theshifting collar'L, as indicated in'Fig; 4, and a-ball thrust bearing'U is engaged by the fixed clutch member I for the pinion H to take up the end thrust of the driving shaft'A.

- corresponding lever N, N or N, but when it -Having'-thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A changeable speed gear comprising a driven shaft, a plurality of concentric gear wheels secured to the said driven shaft, a

pinionsin mesh with the said gear wheels on one side of the axis thereof, a normally loose reversing 131111011111 mesh with one of the said gear wheels on the other side of the axis thereof, clutch mechanisms fo engage- ,ment with the said pinions and mounted to slide on and to turn with the said driving shaft, shifting levers for shifting the said clutch mechanisms pins fixed on sundry of a the said shifting levers, spring-pressed swing arms pivoted on the remaining shifting levers, each swing arm carrying a pin, a controller shaft, and .cam arms radiating at different angles from the said controller shaft andadapted to engage the said'pins to actu-- ate the corresponding shifting lever.

-2. A, changeable speed gear provided with a shifting device for a plurality'of independent clutches, com rising shifting levers for shifting the said c utches, pins fixed on sundry of the saidshifting levers, spring-pressed swing a'r'rns pivoted on the remaining shifting levers, each swing arm carrying a pin, a controller shaft, and cam arms radiating at different angles from 'the said controller shaftiand adapted to engage the said pins to actuatethe corresponding shifting levers.

In testimony whereof I'have signed my name to this specification in the presence of two, subscribing. witnesses.

WALTER SCOTT. Witnesses:

JAMES L. BENTLEY. LEANDER A. KEMP.

driving shaft' at a right angle to the said" driven shaft, a plurality of normally loose 

